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Prediction and control of subgrain size in the hot extrusion of aluminium alloys with feeder plates

This paper was first presented at the Extrusion Technology 2008 Conference (Orlando, USA, 2008) which is the definitive international seminar series for the aluminum extrusion industry with 1,300 delegates from >50 countries. The author demonstrated that for the first time a commercial FEM software, together with some customized sub-routines, is capable of: (i) simulating efficiently a three-dimensional extrusion of a thin-walled product; (ii) predicting the macrostructure; and (iii) optimizing the design of extrusion die. Consequently, by reducing the number of prototype dies, this technology gives the opportunity to reduce the amount of scrap metal by 400%.